Amazon Front Page Deal has the 16oz on sale. But the 20oz also is on sale. It has the cheapest price according to CCC.
Zojirushi SM-SA60-RW Stainless Steel Mug, 20-Ounce, Clear Red
Stopper disassembles for thorough cleaning
20oz. capacity with 1-1/2" opening
Compact design takes minimal space while maximizing capacity
New pictograph lock
5 year warranty on heat retention
Made of BPA-free plastic and stainless steel. Easy-to-clean nonstick interior